Commit 0f721292 authored by Laurent Vivier's avatar Laurent Vivier
Browse files

softfloat: define floatx80_round() 



Add a function to round a floatx80 to the defined precision
(floatx80_rounding_precision)

Signed-off-by: default avatarLaurent Vivier <laurent@vivier.eu>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Reviewed-by: default avatarAurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170628204241.32106-5-laurent@vivier.eu>
parent a51b6bc3

fpu/softfloat.c

+16 −0
Original line number Diff line number Diff line
@@ -5085,6 +5085,22 @@ float128 floatx80_to_float128(floatx80 a, float_status *status) 


}



/*----------------------------------------------------------------------------

| Rounds the extended double-precision floating-point value `a'

| to the precision provided by floatx80_rounding_precision and returns the

| result as an extended double-precision floating-point value.

| The operation is performed according to the IEC/IEEE Standard for Binary

| Floating-Point Arithmetic.

*----------------------------------------------------------------------------*/



floatx80 floatx80_round(floatx80 a, float_status *status)

{

    return roundAndPackFloatx80(status->floatx80_rounding_precision,

                                extractFloatx80Sign(a),

                                extractFloatx80Exp(a),

                                extractFloatx80Frac(a), 0, status);

}



/*----------------------------------------------------------------------------

| Rounds the extended double-precision floating-point value `a' to an integer,

| and returns the result as an extended quadruple-precision floating-point

include/fpu/softfloat.h

+1 −0
Original line number Diff line number Diff line
@@ -621,6 +621,7 @@ float128 floatx80_to_float128(floatx80, float_status *status); 
/*----------------------------------------------------------------------------

| Software IEC/IEEE extended double-precision operations.

*----------------------------------------------------------------------------*/

floatx80 floatx80_round(floatx80 a, float_status *status);

floatx80 floatx80_round_to_int(floatx80, float_status *status);

floatx80 floatx80_add(floatx80, floatx80, float_status *status);

floatx80 floatx80_sub(floatx80, floatx80, float_status *status);